All solvents were distilled prior to use. Analytical thin layer chromatography was carried out on Merck DC-plastikfolien Kieselgel 60 F254 plates and products were visualised by UV fluorescence
All solvents were distilled prior touse. Analytical thin layer chromatography was carried outon Merck DC-plastikfolien Kieselgel 60 F254 plates and productswere visualised by UV fluorescence